Dry shaver



Aug. 8, 1939.

H. H. HOY 2,168,823

DRY SHAVER Filed Dec. 2, 1937 2 Sheets-Sheet 1 Inventor liar ve y H HoAug. 8, 1939. H H. HOY 2,168,823

DRY SHAVER Filed Dec; 2, 1937 2 SheetsSheet 2 I nuentor f/arvey H. HO

Patented- Aug. 8, 1939 UNITED STATES PATENT OFFICE our snAvEn. Harvey HHoy, Fillmore, Calif. Application December 2) 1937', Serial No. muss 2Claims.

This invention relates to cutlery and more particularly safety razorsclassified as dry shavers.

The primary object of this invention resides in the provision of a dryshaver having a movable cutting blade adapted to simultaneouslyreciprocate and oscillate relative to a stationary cutting blade duringits cutting action.

Another object of this invention resides in the provision of a dryshaver having a movable cutting. blade associated with means whereby areciprocatory and oscillatory movement is imparted to the same by asuitable source of power.

A further object of this invention resides in the particularconstruction of the stationary and movable cutting blades.

With these and other. objects in view this invention resides in certainnovel features of construction and arrangement of elements to behereinafter more particularly 'set forth in the specification,illustrated .in the accompanying drawings and pointed out in theappended claims and, while this disclosure depicts my present conceptionof the invention, the right is reserved to resort to such changes inconstruction and arrangement of elements as come within the scope of theclaims.

In the accompanying drawings forming a part of this invention:

Fig. 1 is a side view of a dry shaver as constructed in accordance withthis invention.

Fig. 2 is a plan view thereof.

Fig. 3 is an enlarged vertical cross sectional view approximately online 3-3 of Fig. -2.

Fig. 4 is a plan view of the movable cutting 36 blade.

Fig. 5 is a longitudinal vertical sectional view approximately on line5-5 of Fig. 1.

Fig. 6 is an enlarged plan view of the stationary cutting blade showinga portion of the drive shaft 40 associated therewith in section.

Fig. '7 is a bottom view of the stationary cutting blade partly insection showing the movable cutting blade associated therewith. r

In the present embodiment of this invention 45 the numeral 5 designates,in general, a dry shaver which preferably consists of a hollow handle 6having an electric motor M suitably secured therein and electricallyconnected to a suitable electric switch S having an electricity conduitC 50 extending therefrom to a source of electric current.

Suitably secured to the handle 6 is a stationary cutting blade I whichis provided with a cylindrical bore 8 preferably eccentrically disposedrela- 55 tive to the diameter of the cutting blade so as to provide arelatively thin wall having serrations 9 in the cutting surface thereofand a thicker wall l0 providedwith an open guide slot ll thereinobliquely disposed relative to a line extending through its longitudinalcenter.

. snugly disposed within the bore 8 of the stationary cutting blade I isa cylindrical movable cutting blade l2 having tangently disposed ribs l3formed thereon adapted to contact the inner surfacesof the serrated thinwall thereof and 10 operate in conjunction therewith in performing itscutting action. Formed in the movable cutting blade I2 is a socket orseat It adapted to register with the slot ii in the stationary cuttingblade to accommodate the free end I! of a pitman rod I6 connected to themotor M by 'an eccentric H.

In order to retain the free end of the pitman rod IS in operativeassociation with the movable cutting blade and yet permit it to freelyrock as 20 the eccentric rotates, a substantially spherical head It isformed thereon, the same being of greater diameter than the width of theslot H to prevent dislodgment from the groove or seat ll.

With the aforesaid elements operatively asso- 25 ciated as heretoforeset forth, the pitman rod is reciprocated by the eccentric or othersimilarmeans connected to the motor, whereupon the movable cutting bladenot only reciprocates in a longitudinal direction across the serrationsof 30 the stationary cutting blade but, through the instrumentality ofthe corelated extremity of the pitman rod and guideslot therefor, axialoscillations of the same is produced, thus it is apparent a compoundshearing action is established as the movable blade is manipulated.

Having thus described my invention what I claim and desire to protect byLetters Patent is:

1. A dry shaver comprising a tubular stationary blade open at both endsand having its upper portion formed with a slot extending longitudinallyfrom its rear end diagonally toward its front end, the under portion ofsaid tubular jaw being formed with transversely extending slots spacedfrom each other longitudinally of the jaw and defining transverse teethbetween them, a cutter bar housed in the tubular jaw and slidablelongitudinally and turnable transversely therein, said cutter bar havingits, upper portion formed with a socket registering with the slot of thetubular jaw and its under portion formed with trans- .verse groovesspaced from each other longitudinally of the bar and defining transverseteeth between them for cooperating with the teeth of the tubular jawwhen the cutter bar is shifted longitudinally; a hollow handle extendingupwardly and rearwardly from the tubular jaw and enclosing the slotthereof, a motor in said handle,

and a pitman rod extending longitudinally in said handle andreciprocated from said motor, said rod having its forward 'end portionbent to form a depending pin passing v through the diagonal slot of thetubular jaw and loosely engaged in the socket of the cutter bar forimparting reciprocating and rocking movement to the cutter bar duringmovement of the pin longitudinally in the diagonal slot.

2. A dry shaver comprising a tubular stationary jaw having its underportion formed with a series of transverse slots defining transverseteeth between them, said tubular jaw now being formed with alongitudinal diagonally extending slot, a cutter bar slidablelongitudinally in said tubular jaw and rockable therein, said cutter barhaving its under portion formed with transverse teeth for cooperatingwith the teeth of the tubular jaw and its upper portion formed with asocket registering with the slot of the tubular jaw, and actuating meansfor said cutter bar including a reciprocating pitman extendinglongitudinally of the tubular jaw and having one end provided with a pinextending through the diagonal slot and engaged in the socket of thecutter bar.

HARVEY H. HOY.

